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Multi-Way Conventional loudspeakers with crossovers

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Old 31st October 2012, 05:19 PM   #8331
EarlK is offline EarlK  Canada
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Quote:
Originally Posted by GM
WRT distortion testing, I've no experience or even considered it since I don't recall seeing anything published by Altec in either cut sheets or in tech bulletins beyond recommending that in any type of high power app the speaker's components be limited to a decade, implying that in any consumer app short of a frat party it was a non-issue, so wondering what the distortion looks like when the driver is BW limited 2nd order to 500-5k, etc..
- Looks to me like 1K to 10K is a more realistic BW ( for distortion products, when aligning diaphragms ) .


Click the image to open in full size.
Click the image to open in full size.

- ( Obviously from above ) Altec did publish a few distortion specs ( for their later drivers bolted onto their horns ) / granted, specs are few & far between .

- I suppose I might moderate the goal ( of a 15db spread between H2 & H3 ) down to 12db ( to match Altecs own stats ) / but heck / all these newer horns/waveguides ( sans diffraction slot ) are widely touted for their lower distortion , so why not shoot for a 15db spread to see if it's achievable ?

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Old 1st November 2012, 03:22 AM   #8332
Pano is offline Pano  United States
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Quote:
Originally Posted by GM View Post
I didn't 'hone' the response per se, I align honed the driver, steel shim and horn entrance with a three stone brake master cylinder hone attached to an electric drill to make the transitions as seamless/smooth as practical.
LOL! OK, you really did hone them. Make sense, I just didn't take you literally. Porting and polishing the horns, eh? Real audio hot-rodding is cool.
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Old 1st November 2012, 11:27 PM   #8333
TerryO is offline TerryO  United States
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LOL! OK, you really did hone them. Make sense, I just didn't take you literally. Porting and polishing the horns, eh? Real audio hot-rodding is cool.
Wait until you see the tuned extractor pipes!
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Old 2nd November 2012, 09:36 AM   #8334
AuroraB is offline AuroraB  Norway
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Originally Posted by TerryO View Post
Wait until you see the tuned extractor pipes!
triple chrome plated ???
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Old 2nd November 2012, 03:04 PM   #8335
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For chrome you pay extra:

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The pipes are the ports. Courtesy of Pellegrene Acoustics

acoustic waveguides
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Old 2nd November 2012, 05:48 PM   #8336
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Originally Posted by TerryO View Post
Wait until you see the tuned extractor pipes!
I didn't think to chrome these but it would have been a nice surprise when they took the lid off haha.
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Old 4th November 2012, 06:01 PM   #8337
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Quote:
Originally Posted by IslandPink View Post
Lynn, and Bud .
A relevant ( hopefully ) post here .
If you think you've sorted the speaker wire issue with Bud's Litz/cotton specials , I've got bad news for you !
Just bought some Tellurium Q Blue speaker cable, and now have some 'Black' on loan which is running-in and playing as we speak .
This company is making waves here in the UK , 5-star reviews on all their stuff . The Black costs about £300 for a 3m pair , unfortunately, for us DIY fans ...

My comments here if you are interested :
Colin Wonfor - Page 3 - World-Designs-Forum
Mark, you have no idea how timely this post is for me. I'm looking into this litz / cotton world and frankly unless I want to spend $1k for a larger quantity than I need (new), finding litz to the 99.99 spec is not so easy. ...nor is the cotton.

I was hoping I could start with a kick-*** DIY cable and only then invite the commercial stuff to compete (and with a return policy). But because of the low price of the TQ cables you mentioned above, one possibility is to start out with the TQ and then have the litz/cotton attempt to compete. I will have to rearrange things in my house before I can proceed with the right length of cables. In the meantime, I can follow things and see how they develop. Same goes for this speaker.
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Old 4th November 2012, 10:55 PM   #8338
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Originally Posted by charliemb View Post
Mark, ...
Above I forgot to ask my questions. I'll ask now...

Mark, how is the testing going with the TQ black?

And how do the highs compare to the litz/cotton?

And finally, on your litz cables, how many pieces of shrink tubing do you have, how big are they, and how far are they spaced apart?
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Old 5th November 2012, 08:04 PM   #8339
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Hi Charlie
Well, the HF-end of the Blacks is not quite there ( not as good as Bud's litz ) but I've got one length on burn-in with a signal generator currently, as I'm told it takes anywhere from 100-300 hrs at normal volumes to reach its best . I hope it comes around, as the coherence from mids to bass is really something .
For Lynn's benefit, what I'm hearing with this wire is like going from an RC RIAA network to an LCR one, in a phono, in that there is a much better dynamic and tonal integration between the bass and mids .

For info, on the litz, I am currently using what Bud suggested, which is one piece of heatshrink about 1.5" long , every 0.5m or so ( sorry to mix units ) . As I have said, I have no theory at all about what this is doing, except that it makes a big difference to the sound !
It may be that I will experiment a bit more with extra pieces now, given what I've been hearing from the TQ wires.
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Old 6th November 2012, 08:14 AM   #8340
Jmmlc is offline Jmmlc  France
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Hello,

Lot of OT things those last days isn't it?

Le blog de audiobricolos

Best regards from Paris, France

Jean-Michel Le Cléac'h
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